Here is the full list of all 50 Seduce Me 2: The Demon War achievements.
Fail The Dragon's Test
Watch Your Love Burn
Give Your Life For Damien's
Have him a Demon Forever
Become Lost in Destiny
Perish Centimeters From Your Love
Learn of Saero and Ezaeur's Fate
Keep Ezaeur Forever
Return Home with Sam
The Four Rebel Leaders Work Together
Share Diana's Love with Saero
Become Baptized by Saero
Begin Diana's Story
Die At The Hands of the Spirit
Experience Erik's Eternal Devotion
Witness Inequality
Welcome New Joy with Matthew
Lose your Trainer
Begin Matthew's Story
Become Victim of Revenge
Get Away from the War with Fae
Live a Human Life with Damien
Help True Love Prevail for Saero and Ezaeur
Let Saero Search for the Rose
Begin Damien's Story
Begin Erik's Story
Rule The Demon World with Aomaris
Become Queen of the Demon World
A Gift From Hell
Use Blood Magic against the Demon Lord
Begin Sam's Story
Defy Destiny with James
Diana Rules the Demon World
Trap the Demon Lord Without Bloodshed
Begin James's Story
Experience More of This Story
Meet K, your guide!
Witness The Last One Standing
Mourn The Death of the Rebel Queen
Betray the Rebel Queen
Rabbit Rules the Demon World
Fae Rules the Demon World
Shadow Rules the Demon World
Sergeant Refuses to Rule
Go Through the Brute's Test
Learn Shadow's Secret
Obtain an Angel's Forgiveness
Be Sentenced by an Angel
Put Trust in a Killer
Experience The Story For the First Time